Teeeitoet



(No Model.)

J. KELLY.

BOILER FLUB ATTACHMENT.

No. 373,237. Patented Now-15, 1887.

ENTOR WITNESES ATTORNEYS.

N. PETERS. PhMo-Lflhugnplmr. Washiug'on. IL C.

UNITED STATES PATENT OFFICE.

JOHN KELLY, OF BLAKE, UTAH TERRITORY.

BOlLE R-FLUE ATTACHM ENT.

SPECIFICATION forming part of Letters Patent N 0. 373,237, datedNovember 15, 1887.

Application filed April 13, 1887. Serial No. 234,603. (No model.)

' in the county of Emery andTerritory of Utah,

have invented a new and Improved Boiler- Flue Attachment, of which thefollowing is a full, clear, and exact description.

The object of my invention is to provide a new and improved boilerflueattachment which prevents dust, sparks, or unconsumed portions of thefuel from entering the flues.

The invention consists in a plug secured to each flue at its front end,and having a central recess and a top or side opening.

Reference is to be had to the accompanying drawings, forming apart ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a longitudinal sectional elevation of my improvementattached to a boilertube. Fig. 2 is a plan view ofmy improvement; andFig. 3 is a vertical cross section of myimprovement on the line xxofFig. 1, and showing the improvement applied to a boiler. v

Heretofore the dust, cinders, and parts of unconsumed fuel were drawn bythe draft of a the boiler in andthrough the boiler-fines, thus cloggingthe flues and wasting partof the fuel. With my improvement. presently tobe described, I prevent the clogging of the lines and permit a fullcombustion of all the fuel.

The improvement consists in a plug, A, preferably slightly tapered atone end and provided with a central recess, B, from which leads anopening, 0, through the wall of the plug A, formed by the recess B.

A plug, A, is driven with its tapering end into the front end of eachflue D of the boiler E, so that the opening G remains outside of eachflue D, the said opening being turned to the sides in the top row offlues D and upward in the following rows of flues, as shown in Fig. 3.Now it will be seen that the heatingchamber communicates with the fluesD by the openings 0, and the dust and cinders from the flue cannot passinto the flues E, as the dust and cinders are first thrown up againstthe crown-sheet F, and on being downwardly deflected strike the top rowof plugs A and fall again into the fuel. The next rows of plugs A havetheir opening 0 turned upward, and the cinders cannot be drawn intothese openings after striking the top plugs, as the latter form a coverfor the next lower ones, and these again form a cover for the openingsOof the following lower rows.

The opening 0 in each plug A is generally made of about the same area asthe cross-section of a flue, A, so as to permit as much heat to passinto flues as in the ordinary way. Now it will further be seen that byusing the plugs A, I change the direction of the draft,

thus preventing the fire in the fire-box from being lifted and broken bythe exhaust of the locomotive-engine as it occurs at present, as the hotair is drawn from the top of the firebox, instead of being drawndirectly through the gratebars and the fire.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. The boiler-flue attachment consisting of theplug having in it a central recess or bore and a lateral openingcommunicating with said bore or recess, substantially as and for the

